<template>
  <el-container class="homeContainer">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="@/assets/logoHome.png" alt="" />
        <span>vue管理平台</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container class="mainContainer">
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          :default-active="activePath"
          active-text-color="#01A0E2"
          class="el-menu-vertical-demo"
          :unique-opened="true"
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menulist"
            :key="item.id"
          >
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menulist: [],
      iconsObj: {
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao',
      },
      isCollapse: false,
      // 被激活的链接地址
      activePath:'',
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    // 退出按钮
    logout() {
      // 清空token
      window.sessionStorage.clear()
      // 跳转到登录页
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    // 点击按钮，切换菜单的折叠和展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
      console.log(this.isCollapse)
    },
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath = activePath
    }
  },
}
</script>

<style lang="less" scoped>
.homeContainer {
  background-color: #eee;
  width: 100%;
  height: 100%;
  .el-header {
    background-color: #01a0e2;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #fff;
    font-size: 18px;
    > div {
      display: flex;
      align-items: center;
      span {
        padding-left: 14px;
        border-left: 1px solid #fff;
      }
      img {
        padding-right: 14px;
      }
    }
  }
  .mainContainer {
    .el-aside,
    .el-main {
      background-color: white;
      margin-right: 10px;
      .el-menu {
        border-right: 0;
      }
    }
    .toggle-button {
      background-color: #e6edf4;
      font-size: 10px;
      line-height: 24px;
      color: #000;
      text-align: center;
      letter-spacing: 0.2em;
      cursor: pointer;
    }
  }
  .iconfont {
    margin-right: 10px;
  }
}
</style>

